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Add South Korea Working Days

Adds or subtracts South Korea authority-scope working days in exact coverage.

When to use

You need a deterministic South Korea working-day offset.

Do not use when: The package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 schedules are not inferred.

Example user requests

Add or subtract South Korea working days around New Labor Day public holiday.
Add or subtract South Korea working days around Published substitute holiday.

Formula

move one day at a time; decrement only on status.is_working_day=true

Skip Saturday/Sunday and exact pinned authority events; do not add unverified substitute days.

Inputs

Parameter	Type	Unit	Required	Description
`start_date`	date		yes	Gregorian start date in 2026-2026.
`working_days`	integer		yes	Signed offset; start date excluded for non-zero offsets. Range: ≥ -1000, ≤ 1000

Outputs

Output	Type	Description
`start_date`	date	Input date.
`result_date`	date	Date reached.
`working_days_added`	integer	Signed requested offset.
`calendar_days_elapsed`	integer	Signed Gregorian difference.
`public_holidays_skipped`	list	Exact events crossed.
`territory`	string	KR (South Korea).
`territory_name`	string	South Korea
`day_type`	string	Deterministic classification: official_weekend, regular_workday, or the first published authority event kind.
`holiday_names`	string_list	Events applying on the date.
`holiday_kinds`	string_list	Authority event classifications.
`holiday_details`	list	Structured event details, including partial-day notes where published.
`calendar_scope`	string	South Korea statutory public holidays and public-office substitute holidays for 2026
`holiday_policy`	string	National, substitute and election holiday event kinds are preserved; this is not a universal private-employer or school closure calendar.
`substitute_day_policy`	string	Only the published 2026 substitute dates are included; employer exchanges, local-government holidays and school schedules are not inferred.
`calendar_profile`	string	south-korea-public-holidays
`dataset_version`	string	kr-public-holidays-2026.1
`sources`	list	Authority and legislation sources.

Example

Zero offset is identity: {"start_date":"2026-01-01","working_days":0} → {"result_date":"2026-01-01","working_days_added":0}

GET https://tttkmbb.com/api/v1/calculate/south-korea-public-add-working-days?start_date=2026-01-01&working_days=0

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/south-korea-public-add-working-days (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/south-korea-public-add-working-days · Markdown: https://tttkmbb.com/everyday/south-korea-public-add-working-days.md · JSON definition: https://tttkmbb.com/everyday/south-korea-public-add-working-days.json
MCP: server https://tttkmbb.com/mcp, tool run_calculator with calculator_id="south-korea-public-add-working-days"
OpenAPI operationId: add_kr_working_days
Freshness: static. Authentication: none. Rate limit: fair use (see rate limits).

Sources

Korea National Law Information Center – public holidays regulation (government_law)
Ministry of Personnel Management – Labor Day and Constitution Day public holidays (government_press_release)
Ministry of Employment and Labor – Labor Day public-holiday implementation (government_press_release)
Korea Astronomy and Space Science Institute – 2026 calendar data (government_calendar_reference)

FAQ

Does this represent every Korean employer's closure calendar?

No. It is a statutory/public-office evidence package for 2026; employer, school, bank, exchange and local schedules are not inferred.

Related calculators

South Korea Working Day — Inspect a date and source evidence.